及时、客观、冷静应对突发性校园暴力事件的案例启示

当前高校校园暴力事件频频发生,高校思想政治教育又增添了新的挑战和反思,这也对高校能够预防和及时处理好各种突发性事件提出了更高要求,为把不良影响和损失降到最低,这对任何一所高校而言都是严峻的考验,突发性暴力事件处置程序是否完善、处置方式是否得当直接影响到学校,特别是学生的前途和未来。本篇由真实案例的处理过程谈起,探讨针对校园暴力事件如何及时、客观、冷静的应对,做到平稳过渡、和谐处理。     

杆状物对舰载比幅测向的影响研究

通过对杆状物信号反射的分析,研究了舰上杆状物对无源比幅测向的影响,对其中杆状物与天线距离、杆状物截面半径、长度、入射雷达信号波长等因素造成的无源比幅测向误差进行了定量分析。     

A survey on life prediction of equipment

Once in the hands of end users, such durable equipment as spacecraft, aircraft, ships,automobiles, computers, etc. are in a state of debugging, working or storage. In either state, availability, reliability and super-efficiency are the ultimate goals, which have been achieved through constant monitoring as well as regular, preventive, routine and corrective maintenance. Although some advanced instruments can visualize certain invisible malfunctioning phenomena into visible ones, deeply hidden troubles cannot be found unless monitoring and testing data are addressed using tools that process the data statistically, analytically and mathematically. Some state-of-theart trouble-shooting and life-predicting techniques and approaches are introduced in this paper.     

多模切换控制方法及其在分导飞行器姿态机动控制中的应用研究

研究一类离散切换系统的鲁棒保性能状态反馈控制器设计问题。利用切换Lyapunov函数和线性矩阵不等式方法,得到了鲁棒保性能控制器存在的一个充分条件,给出了控制器的参数化表示,并将次优保性能控制器的设计问题转化为基于线性矩阵不等式约束下的凸优化问题。最后将所提理论应用于某飞行器的控制方案设计中,说明了本文所提设计方法的有效性。     

China Academy of Launch Vehicle Technology

OVERVIEW China Academy of Launch Vehicle Technology (CALT) was founded on November 16, 1957. It was the first research unit devoted to the development of launch vehicles     

飞机翼盒梁间肋研制标准化应用研究

介绍了在飞机翼盒梁间肋研制过程中采用标准化流程,通过对零件加工周期、工艺方案、机床选择、快速装夹设计、程编参数设计、测量方案以及质量评审等细节的标准化应用,规范了研制中的操作步骤,最终达到了提高数控加工效率和质量的目标。     

Cycle slip detection using multi-frequency GPS carrier phase observations: A simulation study

The detection and repair of the cycle slip or gross error is a key step for high precision global positioning system (GPS) carrier phase navigation and positioning due to interruption or unlocking of GPS signal. A number of methods have been developed to detect and repair cycle slips in the last two decades through cycle slip linear combinations of available GPS observations, but such approaches are subject to the changing GPS sampling and complex algorithms. Furthermore, the small cycle slip and gross error cannot be completely repaired or detected if the sampling is quite longer under some special observation conditions, such as Real Time Kinematic (RTK) positioning. With the development of the GPS modernization or Galileo system with three frequencies signals, it may be able to better detect and repair the cycle slip and gross error in the future. In this paper, the cycle slip and gross error of GPS carrier phase data are detected and repaired by using a new combination of the simulated multi-frequency GPS carrier phase data in different conditions. Results show that various real-time cycle slips are completely repaired with a gross error of up to 0.2 cycles.     

解流水车间作业排序问题的一种禁止搜索算法

流水车间的作业排序（Ｆｌｏｗｂｓｈｏｐｓｃｈｅｄｕｌｉｎｇ）问题是生产管理与组合优化领域研究的重要课题。禁止搜索（ＴａｂｕＳｅａｒｃｈ）算法对于这类问题具有较强的寻优能力。本文针对流水车间的作业排序问题设计了一种禁止搜索算法的实现形式，通过大量的算例分析表明，该算法具有良好的寻优性与运算效率。     

钛硅共晶合金中硅化物及其对显微硬度的影响

观察了钛硅共晶系合金的微观组织。综合分析了X射线能谱（X－EDS）、透射电子显微镜（TEM）以及X射线衍射（XRD）结果，确认了铸态组织中析出的硅化物本质，并测得该硅化物的显微维氏硬度。结果表明，钛硅共晶合金铸态组织由α-Ti和Ti5Si3两相组成。亚共晶钛硅合金中共晶区比枝晶区具有更高的显微硬度，而共晶和过共晶合金的共晶区显微硬度明显高于亚共晶合金。